- Definition

Net quantities of an enterprise's interests in proved developed reserves of either crude oil (including condensate and natural gas liquids), natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas as of the beginning and the end of the year. "Net" quantities of reserves include those relating to the enterprise's operating and nonoperating interests in properties. Quantities of reserves relating to royalty interests owned are included in "net" quantities if the necessary information is available to the enterprise. "Net" quantities does not include reserves relating to interests of others in properties owned by the enterprise. The unit of measure for reserve quantities is defined as "barrels" for oil and synthetic oil reserves or "cubic feet" or "cubic meters" for natural gas and synthetic gas reserves.

+ References+ Details

Discontinued Operations Narrative (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended
	Oct. 31, 2013 Black Warrior Basin Properties Alabama	Dec. 31, 2013 Black Warrior Basin Properties Alabama Natural Gas Mcf	Mar. 31, 2014 North Louisiana and East Texas Natural Gas and Oil Properties	Dec. 31, 2013 North Louisiana and East Texas Natural Gas and Oil Properties	Sep. 30, 2013 North Louisiana and East Texas Natural Gas and Oil Properties	Jan. 31, 2014 North Louisiana and East Texas Natural Gas and Oil Properties	Dec. 31, 2013 North Louisiana and East Texas Natural Gas and Oil Properties Natural Gas Mcf	Dec. 31, 2013 North Louisiana and East Texas Natural Gas and Oil Properties Oil bbl
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from the sale of oil and gas property	$ 160
Gain on disposition of oil and gas property	35
Proved Developed Reserves (Volume)		97,000,000					23,000,000	91,000
Sales price						30.3
Impairment of oil and gas properties held-for-sale			$ 1.7	$ 5.2	$ 24.6